hoffman



(No Model.)

B. J. HOFFMAN.

DEVICE FOR PREVENTING 'INGRUSTATION. No. 270,569. Patented Jan. 9, 1883.

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.IINITED STATES PATENT FFICE.

EDWARD J. HOFFMAN, OF SIOUX OITY, IOWA, ASSIGNOR OF ONE-HALF TO DAVID I. MAGNER AND PATRICK J. MAGNER, BOTH OF SAME PLACE.

DEVICE FOR PREVENTING INCRUSTATION.

SPECIFICATION forming part of Letters Patent No. 270,569, dated January 9, 1883.

Application filed November 13, 1882. (No model.)

To all whom it may concern Be it known that I, EDWARD J. HOFFMAN, of Sioux City, in the county of Woodbury and State of Iowa, have invented certain new and useful Improvements in Devices for Preventing Incrustation ofBoilers; and [do hereby declare that the following is afull, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to to make and use the same, reference being bad to the accompanying drawings, which form a part of this specification, and in which--- Figure l is a sectional view of a part of a steam -boiler provided with my device, and

1 Figs. 2 and 3 are detail "iews.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to devices for preventing incrustation of steam-boilers; and it consists in the detailed construction otabasket or receptacle adapted to be suspended from the tines of the boiler.

It is well known that many substances will prevent incrustation ot' boilers, such as sawdust, bark, pitch, and many other substances; and to form areceptacle for such substances 1 make baskets A of wire-cloth or perforated zinc, suspended by hooks B,ofcopper wire, from the lines 0. These baskets are rectangular or of 0 any desired shape, having sides and bottom perforated, and provided with a cover or lid if they areintended to contain Light substances' such as sawdust or bark-which are easily washed away by the agitation of the boiling 5 water. By means of the hooks B the baskets may be suspended from the flues in the boiler at different places in the boiler, so as to bring all the water contained-in the boiler in contact with the substance contained in the basket.

To enable the water in the boiler to come in 40 contact with as much of the substance'as possible, the basket may be provided withshelves 3, such as shown in cross-section in Fig. 3 of the drawings, fastened alternately to opposite sides of the basket, and extending with their 5 free endsinto the spaces between the shelves upon the opposite side. In this manner the water passes over and around the substance which prevents the incrustation, and is subjected to its influence, whether it be in absorb- 5o ing what it contains or in depositing the lime or salt it contains.

I am aware that substances preventing incrustation have been placed in wire baskets depositedin the bottoms of steam-boilers; but in this manner all the water in the boiler does not come in contact with the substance in the basket, which I efi'eot by suspending the baskets, and I do not claim that, broadly; but

What I do claim,and desire to secure by Letters Patent, is

' The basket A, of wire cloth or perforated sheet metal, having shelves 0 fastened alternately to opposite sides of the basket, and hooks B B at both ends, adapted to contain substances preventing incrusta-tion in boilers, and to be suspended at different places in them from the flues by means of the hooks, substantially as and for the purpose shown and set forth.

In testimony that I claim the foregoing as my own I have hereunto atfixed my signature in presence of two witnesses.

EDWARD J. HOFFMAN.

Witnesses:

M. B. DAVIS, H. J. HARRINGTON. 

